Typewriting machine



March 12, 1940. w v HELMOND" 2,193,627

il!IPEWRITINGv MACHINE Filed Match 12, 1937 :s Smets-sheet 1 /06 l: jj f4 ya? j w. F. H ELMoNn 2,193,627

TYPEWRITING MACHINE March 12, 1940.

Filed March l2, 1937 5 Sheets-Sheet 2 "M l l ,57E- 5- if 67 /f By v /7 Affomfy.

Mardi v12, 1940. W, F HELMOND 2,193,627

'YPEWRITING MACHINE Filed March 12,' 19374 3 Sheets-Sheet 3 Patented Mar. 12, 1940 l UNITED STATES TYPEWRITING MACHINE William F. Helmond,` West Hartford, Conn., asf

signor to Underwood Elliott Fisher Company,r New York, N. Y., a corporation ofDelaware 1 f v Application March 12, 1937, Serial No. 130,537

` 1l Claims. (Cl. 19V-189) l This invention relates to typewriters, and particularly to page-end alarms or signals. i

The invention includes a weak butl repetitions alarm, such as the blinking of a light` in the line of vision, or the tinkling of a bell.

There are yemployed two page-end alarms, on

'of which may be actuated at a certain predeter- .mined line above the page-end andthe other vof which may be actuated at another predetermined line above the page-end, or a signal may be actuated at each line of a predetermined number above the page-pend.

One signal may be mounted on the carriage and the other on the front of the typewriter. One signal may be primary, and the other may be repeatedly operated while typing.

A signal may operate independently and'inn` i nately, the attentionsarrestingwalue of the signal being in this manner greatly enhanced. The

signal may :be actuated by a paperefeeler "that drops intofa circumferential groove in the platen. A paper feeler may cause a pinion` mounted in the frame to mesh with a carriagerack,;and the pinion may `actuate a blinking or intermittentv signal. l v

The-signal proper may be a `,rotatable disk,.a part of which is visible through the front-plate .l vof the typewriter, and having sectors fof contrasting colors. Or the signal may be a 'tinkling bell intermittently actuated and having the lclapper pivotally mounted and balanced under tension.

Other features and advantages will hereinafter appear.

In the accompanying drawings, Figure 1 is a left side elevation, partly sectioned, showing a disk signal at the right and the operating pinion `out of mesh with the carriagerack, and a carriage signal held inoperative while a sheet of paper is under the paper-feeler.

Figure 2 isa'iront elevation, parts sectioned Figure 7 shows a paper-sheet on which theI locus of the primary signal for a given setting and the locus of the secondary' signal are indicated.

-Figure 8 shows the lower end of a paper-,sheet n which the locus of the primary signal at a setting further from the page-end thanin Figure f secured by screws I4 to the frame IQ. An. escapement housing l5 supports a carriage-escapement ratchet wheel i6 and pinionl l10n pivot I8. An escapement` pawl i9 is shown in Figure 2.- A scale-bar 20 and-front cross-rods 2! and 22j are shown mounted on the frame i6 in Figure l. Cn the rear of the frame it! is supported av carriage rail 23 on which a carriage 2li is slidably supported by means of depending brackets 25 at the rear. A spring drumv 2.5 is mounted inthe framek l0 and `winds a tape 2,1, the free vend of which is tied to a screw28 depending from the carriage bracket 25,' to propel the carriage. A case-shift arm 29- is mounted in the typewriter on a rockshaft 30 and supports a rail 3i atthe front. An

4actuating lever 32 engages the shift-arm 29. Roller 33 rotatably mounted on. a sorewv 39 on l an arm 40, dependsfrom rod 34 mounted in link 35y which is suspended from rod 36 and supported on a side 31 of the platen-carriage, and supports the carriage 2li on the rail 3i and is preyvented from jumpingthe rail 3i by a hook 38 fastened on front of the arm il@ by a screw lll.k

Arms 45 support the platen-carriage and are pivoted on the shaft 45 which ismounted on arms 51 on the carriage 2li. An inclined papertable 48 at the rear of the paten-carriage supports a work-sheet'llg and'feedrolls 50, 5|, 52 engage the work-sheet 49 and hold it against the surface of a platen 53 which' is rotated in the usual manner by a line-space and carriage-return /lever 54 rotatably mounted on a post 55 on lthe left side of the carriage 2t, the rear end of lever 54 engaging a line-space plunger 58. A lever 5 1 pivoted on a screw 58 mounted on the plunger '56 measures the number of line-spaces and a ratchet-Wheel 59 is engaged by a pawl 12 (see Fig. 4)' and a detent 6I! pivoted on a screwll mounted 1 of the platen-carriage.

G2 returns the line-space plunger 50 to normal position. The platen 53 is rotatably mounted in sides 31 of the platen-carriage on a shaft 63 and is manually adjusted by a knob 64. A type-head S5 swings toward the platen 53 in the direction of the dotted line. A carriage-rack G5 (see Fig. 4) is supported on arms 91 pivoted by screws S8 on the sides of the carriage 24 and is released by depressing linger-pieces 69 adjacent the sides 31 A spring 10 secured to an arm 01 above a screw 68 exerts tension to hold the rack (i9 in engagement with the pinion |1. A usual wing guide 1l is mounted adjacent the platen 53 at the printing point. Near the left end of the platen 53 a groove 'i4 is formed. This groove 14 may be a circumferential recess with perpendicular side walls and having a definite predetermined depth so that the bottom of the recess lies in a circle centered on the axis of the platen 53. Mounted on the inner side wall 31 adjacent the groove 'Hi of the platen-carriage is a horizontal pivot stud 15l on which is pivoted the rear end of an arm 19, the front end of which is bent at a right angle across the platen 53 and again bent at a right angle to position a paperfeeler 11 over the recess 14. The bottom of the paper-feeler 11 is rounded to present a smooth Ysurface to either a paper work-sheet 49 or the bottom of a recess 1li, and has a low-pitch inclined lower edge at the rear, and another inclined lower edge at the front. The lower rear edge provides a cam that is engaged by the top edge of a work-sheet 49 and so as the work-sheet 49 is advanced the paper-feeler 11 is pushed out of the recess against the tension of a spring 18 one end of whichV is tied to the arm 16 at 19 and the other end of which is looped about a pin projecting inwardly from the adjacent side 31 of the platen-carriage. The other or front inclined bottom edge of the paper-feeler 11 provides for a not too abrupt dropping of the paper-feeler 11 into the groove 14 when a page-end passes the paper-feeler 11. It is obvious that for a certain position of the stud 'i5 the distance of the paperfeeler 'I1 from the printing point always remains the same. Provision is made for adjusting this distance by providing a plurality of holes 8| in the side 3'? for setting the pin 15 in a plurality of positions so separated from each other that the paper-feeler 11 is moved circumferentially of the platen 53 exactly one or more line-spaces. Auxiliary pins 80 provide anchorage corresponding to the holes 0| for the spring 18 to maintain a uniform tension on the arm 1S. A link 82 is pivoted to the forward end of the arm 15 at 83 and has a hook 84 at the upper end by which it is pivoted in an arcuate slot B5 formed in an arm 30, the slot 09 being arcuate with reference to an axis formed by a pin 99 extending inwardly from a side 31 of the platen-carriage on which the arm 33 is pivotally mounted. The arm 88 supports a signal 99 which, in the inoperative position lies fiat over a side 31, as shown in Figures l and 2, and in the operative position is upright as shown in Figure 5. The signal 90 may be a. at metal piece and may have a colored or light-reecting front surface formed by polishing which may also show some eye-arresting design such as the image of a hand 9| formed thereon as shown in Figure 6. To the lower end of the arm 80 is fastened the upper end of a light coil .spring 92 which is secured on a post 93 mounted on the inner wall of the side 31 of the platencarriage. y

Referring to Figure l, the work-sheet 49 `is holding the paper-feeler 11 out of the recess 14 so that the arm 16 is swung downwardly on its pivot pin i5 to the lowermost position and so the link 82 is moved to the bottom of the arcuate slot and the arm 8B is tilted on the pivot 89 until the signal proper engages and overlies the top of the side 31 in which position it lies nat on and merges with a mask or cover 95, decoratively covering the side 31, and offers practically no obstruction or protuberance, nor in the inoperative position, being practically inconspicuous, does it in any way distract the operator. The condition obtaining in Figure 1 is maintained until the bottom of the work-sheet 49 passes the paper-feeler 11 whereupon the spring 18 pulls the paper-Ieeler 11 into the recess 14 and simultaneously lifts theI arm 16 and the link 82. When the upper end of the link 02 is pushed up into a free position in the slot 85, as shown in Figure 5, the counter-balancing spring 92 and the momentum imparted to the signal 90 thereby cause the signal 90 to swing to position 90A when spring 92 is again tensioned to swing the signal 99 to position 90B. That is, the play of the link 82 in the slot l5 permits the signal 90 to swing back and `forth between the two positions 90A and 95B for a considerable interval of time. This vibratory motion of the signal 90 greatly increases the eye-arresting value of the signal in warning the operator of the approach of the page-end a predetermined adjustable number of lines above the page-end. As shown, the pivotal axis of pin 89 is parallel with the axis of the platen 53. The exact counter-balancing of the arm 16 and the link 82 by the spring 18 to hold the paper-feeler 11 on the paper 49 with suitable pressure and the nice counterbalancing of the signal 90 and the spring 92 improve the operative performance of the signal 90. This signal is always started at the end of a line after line-spacing and wig-wags, or vibrates, during carriage-return to the beginning of a line of typing, thereby providing a simple and effective signal.

The foregoing signal 90 may be associated with another page-end signal as an initial or primary page-end signal.

A second paper-feeler |00, triangular, with the corner polished so to protect sheet 49, is mounted over the groove 14 and preferably in a peripheral path oiset from that described by the paperfeeler 1l'. When combined with the latter the paper-feeler 11 gives a primary signal because it is displaced downwardly and rearwardly with reference to the paper-feeler |00 a distance which, as shown in Figure 1, may be equivalent to one line-space, or in other settings of the paper-feeler 11 another number of line-spaces, that is, the paper feeler |00 may be permanently set to give a last-line signal operative during the last line of typing. Referring also to Figure 2 the paper-feeler |00 projects rearwardly at a right angle to the arm |0| which is mounted on a forwardly extending arm |02 integral with a lever |03 pivoted on a pin |04 projecting inwardly from the inside wall of the carriage-end plate 31. A spring |05, secured to the top of the arm |03 and to a pin |06, tends to lift the arm |03 and concomitantly pull the paper-feeler |00 into the groove 14, if no resistance be offered. The lever |03 however may have at the top a forwardly extending arm |01 which terminates at the front in a downward extension |08, the top of 4which may be an inclined cam engaged and depressed by a dependency |09 from the line-space plunger 5|fas it is pushed rearwards. It is clear therefore that the -spring r|05 tends to lift the arm |01 up behind the dependency |09 but if the paper-feeler I is overlying a work-sheet 49 or the plunger 56 has been pushed rearwardly so that the dependency |89 engages the flat top of the arm |01, the arm |03 can not be actuated.

The arm HB3 has a downward extension |||l in the bottom of'which is fixed the left end of a rod ||2 the right end of .which is fastened in an arm H3 pivoted von a screwl it mounted on the inner wall of the other carriage-end side plate 31 directly opposite the pin |511. A bell-crank i5 is pivoted on a screw H5 mounted on the escape-- ment housing i5 and has an upwardly extended slotted arm H1 which engages bothy sides of the rod H2 so that in either upper or lower case position when arm W3 swings upwardly o-r downwardly bell-crank i i5 rocks on the pin le. The rearward part of the bell-crank ||5 supports' a pinion |23 engageable with the rack '55 and which has a bev-el gear H9 engaged with a bevel gear IM supported on the inner end of a shaft |2| the opposite end' of which is supported in the upper end of a bracket |22 Imounted on the key-lever bracket |2 to which it is detachably secured by screws |23. `Near the vleft end of the shaft |2| is a bevel gear |24 meshing with a bevel gear |25 mounted on the inner end of a'shaft IE5 rotatably mounted at the rear in the bracket 22 and at the front in the plate i3. The plate i3 has two' apertures |28, and |29 below and above the end of the shaft |25, and fixed on the shaft |25 behind the apertures is a disk 13u the front face of whichmay bear sectors of contrasting colors as shown .in Figure 3. At the rear a weight i3! is `secured to the disk |39 so that in the inoperative position the `disk |39 takes the position shown in the drawings with a relatively inconspicuous color exposed' in the apertures |28, |29.

The modus operandi oi the secondary signal is now clear. When the line-space and carriage-- return lever 5d is actuated to return the carriage 2d the dependency it moves up the cam E98 and over the arm i'l and holds the arm m3 and the paper-feeler |00 against n'iovement,4 but when the lever 5f@- is released at the beginning of the last line, the spring |335 moves the paperfeeler mi? intothe groove 1li and swings the gear HB up into mesh with the rack t5 so that the disk I3 rotates and intermittently exposes con'- trasting colors in the apertures |23, |29 inthe front of the typewriter during the letter-space feed of the carriage 24 across-the last line of typing. When, however a new work-sheet E9 is inserted on the platen 53, gear Ht is pushed down out of mesh with the rack G6.

Referring to Figure 9, a modification of the last-line intermittent signal is shown in which for the gear H8 is substituted a pinion |35 carried by the rear arm of the bell-crank H5. When the paper-feeler lil@ enters the groove 14 pinion |35 meshes with the rack 5G, so that during last-line letter-space feed the pinion |35 is rotated. Mounted to rotate with the pinion |35 is a yoke |35 which is engageable with a trip nger |31 pinned at lon the upper endof a bell clapper lever |39 which supports a clapper |40 on the lower end near a bell IM. A screw |42 mounted on a bracket |43 in the machine frame l0 pivotally mounts the lever |39. A spring |44 is pinned to the center of the arm |39 at |45, and to a pin |46 which is mounted on the bracket |43. The effect of the spring |44 is to cause a repetitions tinkling of the bell |4| followingeach timethe trip finger 31 is engaged by the yoke |35.l The mountingv of the tripy finger |31 permits the yoke |35', if rotated reversely, to trip the finger |31 against a spring m8 linking the iinger E31 and the lever |39 which tends normally to hold the trip |31 in the position shown inf Figure 9 in engagement with a pin |49 mounted on the lever |39. The bell ld! is secured by al screw |50 at a suitable place on the frame it. As shown one of the ends of the yoke |35 alternately engages the trip l31 every six letter-,spaces during the last line oftyping and resilient counterbalancing of the lever ISS causes the bell Mi to tinkle until they other end of the yoke |36 engages the trip i311' 'independent' and may be used separately.

Variations may befresorted to within the scope of the invention, and portions of he improvements may be used withoutothers.

Having thus described my invention, I claim:

1. In a typewritenfin combination, a frame, a carriage mounted vfor reciprocatory movement thereon, a platen rotatably mounted on the carriage and over which 4a paper-sheet is fed, a circumferential groove on the platen, a paperfeeler on the carriage and overlying and held out of the groove while a paper-sheet is thereunder, a spring tending to move said paper-feeler into the groove, a device operable to give a signal mounted on the typewriter frame, a ,rack depending from the carriage, a pinion for operating said signal device engagealole with the rack, and means actuated by the paper-ieeler for movingthe pinion into mesh with said rack to operate the signal device.

2.. In atypewriter, in combination, a frame, a carriage mounted for Areciprocatory movement thereon, a rotatable platen on the` carriage and f over which a paper-sheet'is passed to receive lines of typing, a rack mounted .on the carriage,

,a device,.including a'pinio-n, operable for giving lines of typing, a rack mounted on the carriage, a device, including a pinion, operable for giving a visualintermittent signail mounted on the' typewriter frame, said pinion being engageable with the rack for operating said signal-device,-

sheet-endsensing means controlled by said` connecting said connectable means with said rack.

5. In a typewriter, in combination, a frame, a carriage mounted for reciprocatory movement thereon, a platen rotatably mounted on the carriage and over which a paper-sheet is fed, a circumferential groove on the platen, a paper-feeler on the carriage and overlying and held out of the groove while a paper-sheet is thereunder, a spring tending to move said paper-feeler into the groove, a rack depending from the carriage, an element, having an aperture, mounted at the front of the typewriter, a rotary disk having sectors of contrasting colors mounted behind the aperture, shafting for rotating said disk, and a pinion mounted for movement into and out of mesh with the rack, said pinion operating said shafting, and movable by the paper-feeler into and out of meshing position.

6. In a typewriter, in combination, a frame, a carriage mounted for reciprocatory movement thereon, a platen rotatably mounted on the carriage and over which a paper-sheet is fed, a circumferential groove on the platen, a paperfeeler on the carriage and overlying and held out of the groove while a paper-sheet is thereunder, a spring tending to move said paper-feeler into the groove, a rack depending from the carriage, a bell, a clapper for the bell, a pinion mounted for movement into and out of mesh with the rack, an operative connection from said pinion to said clapper, and means enabling the paperfeeler to move said pinion into and out of meshing position.

7. In a typewriter, in combination, a frame, a carriage mounted for reciprocatory movement thereon, a platen rotatably mounted on the carriage and over which a paper-sheet is fed, a circumferential groove on the platen, a paper-feeler on the carriage and overlying and held out of the groove, while a paper-sheet is thereunder, a spring tending to move said paper-feeler into the groove, a rack depending from the carriage, a bell, a clapper for the bell, a spring for counter-balancing said clapper, a pinion mounted for movement into and out of mesh with the rack, an operative connection from said pinion to said clapper, and means enabling the paper-feeler to move said pinion into and out of meshing position.

8. In a typewriter, in combination, a frame, a carriage mounted for reciprocatory movement thereon, a platen rotatably mounted on the carriage and over which a paper-sheet is fed, a linespace carriage-return lever on the carriage, a circumferential groove on the platen, a paperfeeler on the carriage and overlying and held out of the groove while a paper-sheet is thereunder, a spring tending to move said paper-feeler into the groove, a device operable for giving a signal mounted on the typewriter frame, a rack depending from the carriage, a pinion operative- 1y connected to said signal device and movable into and out of mesh with the rack, means controlled by the paper-ieeler for moving the pinion into mesh with said rack to operate the signal,

and means acting concomitantly with an operation of the line-space carriage-return lever for holding said pinion out of mesh with said rack.

9. In a typewriter, in combination, a frame, a carriage mounted for reciprocatory movement thereon, a platen rotatably and case shiftably mounted on the carriage and over which a papersheet is fed, a circumferential groove on the platen, a paper-feeler case shiftable with the platen and overlying and held out of the groove while a paper-sheet is thereunder, a spring tending to move said paper-feeler into the groove, a device operable for giving a signal mounted on the typewriter frame, a rack depending from the carriage, a pinion on the frame operatively connected to said signal device and movable into and out of mesh with the rack, a connection operable by the paper-feeler for moving the pinion into'mesh with said rack to operate the signal, said connection being arranged to permit caseshifting of the paper-feeler with the platen.

10. In a typewriter, in combination, a frame, a carriage mounted for reciprocatory movement thereon, a platen rotatably and case shiftably mounted on the carriage and over which a papersheet is fed, a circumferential groove on the platen, a paper-feeler case shiftable with the platen and overlying and held out of the groove while a paper-sheet is thereunder, a spring tending to move said paper-feeler into the groove, a device operable for giving a signal mounted on the typewriter frame, a rack depending from the carriage, a pinion on the frame movable into and out of mesh with the rack, and means actuated by the paper-feeler for moving the pinion into mesh with said rack to operate the signal, said means comprising a lever connected to the paper-feeler and case shiftable therewith, and a lever mounted on the frame and operated by said rirst named lever to move the pinion into and out of mesh with said rack, said levers having a connection permitting relative movements of said levers at the case shifts.

ll. In a typewriter, in combination, a frame, a carriage mounted for reciprocatory movement thereon, a platen rotatably mounted on the carriage and over which a paper-sheet is fed, a circumferential groove on the platen, a paper-feeler lever pivoted on the carriage and having a paperfeeling end overlying and held out of the groove while a paper-sheet is thereunder, a spring tending to move the paper-feeler into the groove, a device operable to give a signal mounted on the typewriter frame, a rack depending from the carriage, a pinion engageable with the rack and operatively connected to said signal device, a bell-crank operable for moving the pinion into and out of mesh with said rack, a pivot on the frame on which the bell-crank is pivotally mounted, a slot in an arm of the bell-crank, a cross rod engaging said slot, one end of said rod being connected to an arm of the paper-feeler lever, and an arm pivoted on the carriage and supporting the other end of said cross rod.

WILLIAM F. HELMOND. 

